Sheet having antistatic function and manufacturing method therefor

(19)

(11)

EP 0 902 333 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	25.07.2001 Bulletin 2001/30

(43)	Date of publication A2:
	17.03.1999 Bulletin 1999/11

(21)	Application number: 98116986.5

(22)	Date of filing: 08.09.1998

(51)	International Patent Classification (IPC)⁷: G03G 15/00

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

09.09.1997 JP 24439697

(71)	Applicant: Matsushita Electric Industrial Co., Ltd.
	Kadoma-shi, Osaka 571-8501 (JP)

(72)	Inventors:
	Hattori, Akiyoshi Yahata-shi, Kyoto 614-8376 (JP) Hasegawa, Shinya Uji-shi, Kyoto 611-0021 (JP) Yoshiiike, Nobuyuki Ikoma-shi, Nara 630-0134 (JP)

(74)	Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät
	Maximilianstrasse 58 80538 München 80538 München (DE)

(54)	Sheet having antistatic function and manufacturing method therefor

(57) A sheet enhanced in antistatic function has, on a substrate:

two layers of thin tin-doped indium oxide films to which tin is doped in different amounts;
two layers of thin antimony-doped tin oxide films to which antimony is doped in different amounts; or
two layers of thin aluminium-doped zinc oxide films to which aluminium is doped in different amounts wherein tin, antimony or aluminium is doped in a larger amount in an upper (surface) layer of said thin tin-doped indium oxide films, said thin antimony-doped tin oxide films or said thin aluminium-doped zinc oxide films than in a lower layer.